These are not easy in containers. Maybe if the container was really large. They have notorious roots that dislike containers. I am not that familiar with this species, but with others this is true. There are some tropical and subtropical species that would probably work well in containers. Also nearly all perennials will not thrive in containers if left outside in your climate. They freeze solid and this usually kills them. It sort of becomes USDA Plant Hardiness Zone 1 or 2 in a container. You can bury a container, but you probably will forget one year, as well as being a real pain to bury and dig back out. You can even cover it with tons of snow - or put it against a foundation, and cover it with snow, mulch, loose soil, etc. Sometimes an attached garage can work too. Bringing them into your house usually doesn't work either as they need cold. I have an unheated room with wall sized windows that works with some things. Most people don't have this. I actually lost a couple things this year as it got too cold - even though it was not that cold here - I was not heating the rest of the house much - with the forced air system anyway. I actually bring in water plants - hardy water lilies and lotuses. The nursery people (from the south) said this would not work, but it has for years now!
